60W Outdoor Industrial Waterproof PoE Injector - FASTCABLING

Gigabit PoE+ Injector Adapter - 30W 48V Power Over Ethernet Plus - 10/100/1000Mbps, IEEE 802.3af/at Compliant - Up to 100 M (328 ft) Range, by ThePoEstore

PoE Texas 24 Port PoE Injector with 48v120w Power Supply - 10/100 Data - Rack Mount - Add Passive Mode B 802.3af PoE to a Non PoE Switch for VoIP, WiFi AP, IP Camera, Security & Surveillance Systems

Selecting the Right PoE Switch and how to use PoE Switches– A Brief Overview

Amazon

How to extend the range of your network with PoE Extenders

PoE Texas 8 Port PoE Injector - 8 Port PoE Adapter - Add Power Over Ethernet for Passive Devices - 10/100 Data Rate for PTZ, IP Camera Video Security System, VoIP Phone, WiFi Access Point (POE-8-ENC)